<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="./lib/jquery.js"></script>
</head>

<body>

  <form id="form1">
    <input type="text" name="uname" autocomplete="off" />
    <input type="password" name="upwd" />
    <button type="submit">提交</button>
  </form>

  <script>
    // ①获取表单元素, 注册submit事件
    $('#form1').on('submit', function (e) {
      // ②阻止默认行为
      e.preventDefault()
      // ③获取表单数据 'key=val&key=val'
      const str = $(this).serialize();
      // const fd = new FormData($(this)[0])
      // ④发送请求
      $.ajax({
        type: "POST",
        url: "http://www.liulongbin.top:3006/api/formdata",
        data: str,
        // processData: false,
        // contentType: false,
        success: function (res) {
          console.log(res);
        }
      });
    })



    // 1. 通过 DOM 操作，获取到 form 表单元素
    var form = document.querySelector('#form1')

    form.addEventListener('submit', function (e) {
      // 阻止表单的默认提交行为
      e.preventDefault()

      // 创建 FormData，快速获取到 form 表单中的数据
      var fd = new FormData(form)

      var xhr = new XMLHttpRequest()
      xhr.open('POST', 'http://www.liulongbin.top:3006/api/formdata');
      // 发送表单数据
      xhr.send(fd)

      xhr.onreadystatechange = function () {
        if (xhr.readyState === 4 && xhr.status === 200) {
          console.log(JSON.parse(xhr.responseText))
        }
      }
    })
  </script>

</body>

</html>